Wordpressで指定カテゴリの投稿画像URL一覧を取得したい

Question

###前提・実現したいこと
Wordpressでコンテンツスライダーに表示する画像を指定カテゴリから新しいものから指定数、
画像のURL一覧を取得したいのですが良い方法はないでしょうか？

###該当のソースコード

function get_photo_links_plus($category = '', $yearmonth = ''){
	if($category=='' || $yearmonth=='' ){
		return;
	}
	global $post;
	$count=0;
	$nowyear  = substr($yearmonth, 0, 4);
	$nowmonth = substr($yearmonth, 4, 2);
	$prev_yearmonth = date_i18n("Ym", mktime(0, 0, 0, $nowmonth - 1, 1, $nowyear));
	$args = array(
		'category' => $category,
		'posts_per_page' => -1
	);
	$myposts = get_posts( $args );
	foreach( $myposts as $post ){
		setup_postdata($post);
		if($yearmonth!=date_i18n('Ym',get_post_time())){
			continue;
		}
		$args = array(
			'post_type' => 'attachment',
			'posts_per_page' => -1,
			'post_status' => null,
			'post_parent' => $post->ID,
			'post_mime_type' => 'image'
		); 
		$attachments = get_posts($args);
		if($attachments){
			foreach ($attachments as $attachment){
				$image = wp_get_attachment_image_src($attachment->ID, 'none');
				print '<img src="' . $image[0] . '" alt="" />'."\n";
				$count=$count+1;
			}
		}
	}
	if($count<1){	// get images from old entrys.
		foreach( $myposts as $post ){
			setup_postdata($post);
			if($prev_yearmonth!=date_i18n('Ym',get_post_time())){
				continue;
			}
			$args = array(
				'post_type' => 'attachment',
				'posts_per_page' => -1,
				'post_status' => null,
				'post_parent' => $post->ID,
				'post_mime_type' => 'image'
			); 
			$attachments = get_posts($args);
			if($attachments){
				foreach ($attachments as $attachment){
					$image = wp_get_attachment_image_src($attachment->ID, 'none');
					print '<img src="' . $image[0] . '" alt="" />'."\n";
					$count=$count+1;
				}
			}
		}
	}
	wp_reset_postdata();
}

Comments

[kei344]

「何」が「どのように」わからないのか、どのコードで詰まっているのかなどを具体的に追記されたほうが回答が望めると思います。